DEFINE

 

Description: The DEFINE definition cards allow the user to define boxes, coordinate systems, load curves, tables, and orientation vectors for various uses.

 

Usage:

 

1.  DSI prompts:

>   SELECT OPTION

 

-DEFINE: BOX

 

Description: Defines a specific box shaped volume from two corner points specified in global coordinates.

 

Usage:

 

1.  DSI prompts:

>    ENTER COMMAND

CREATE

 This function creates a new box after the user enters a box ID number and defines the two opposing corners using either nodes, points, or xyz coordinates.

DELETE

This function deletes selected boxes. Boxes can be selected via the following commands: CURSOR AT BOX, KEY IN BOX ID, MULTI-POINT REGION, SELECT ALL BOXES, and WINDOW. Boxes that are selected are displayed in gray. When the user exits the menu, they are deleted.

DISPLAY ON/OFF

Toggle switch.

LIST

Lists the box ID numbers in a pop-up window.

MODIFY

 Allows the user to modify a selected box with new point, node, or xyz coordinates. This command also displays the UL coordinates         representing the two corners of the box in global coordinates.

RENUMBER

•    Renumber the selected box ID numbers or all boxes.

SHOW

•    Displays the nodes and elements of a box in white.  The box may be selected by cursor pick or by box ID.

VIEW

•    Sends the user to the VIEWING OPTIONS MENU.

EXIT

 

2.   When CREATE is selected, DSI prompts:

     >   ENTER NEW BOX ID. (X) OR E TO EXIT

 

3.  After entering new box ID, DSI prompts:

>   DEFINE FIRST CORNER OF THE BOX

    

 

4.  After selecting the first corner, DSI prompts:

>   DEFINE SECOND CORNER OF THE BOX

        

 

Refer to the LS-DYNA User's Manual for further description.

 

-DEFINE: COORDINATE SYSTEM

 

Description: This function allows the user to define a local coordinate system using nodes, points, or vectors.

 

Usage:

 

1.  When CREATE is selected, DSI prompts:

>   SELECT LOCAL SYSTEM TYPE

NODES

    Defines a local coordinate system using three nodes.

SYSTEM

•        Defines a local coordinate system from a previously defined coordinate system or key entry.

VECTOR

•       Uses a vector to define the coordinate system.

 

  When using the MODIFY function to modify a coordinate system, DSI displays the CSYS DEFINITION CARD after the DEFINE COORDINATE CARD LIST, allowing the user to key in the exact XYZ coordinates of the system.

 

-DEFINE: CURVE

 

Description: This function defines a load curve.

 

Usage:

 

1.  When CURVE is selected, DSI displays the following options:

CREATE

   When CREATE is selected, DSI prompts:

     >   ENTER DATA (TIME & VALUE) FOR POINT 1 OR END

 •          At least two points must be defined to create a curve.

 •          Once the two points are defined, the curve is displayed.

 •          Refer to the LS-DYNA User's Manual for further description.

DELETE

•        Displays DEFINE CURVE CARD LIST and allows user to select and delete curves.

ERASE UNREF. CURVE

•        This function allows the user to DELETE either ALL or SELECTED unreferenced curves in a database.

LIST

•        Displays the DEFINE CURVE CARD LIST.

 MODIFY

•        Displays the DEFINE CURVE CARD LIST and the CURVE DEFINITION CARD once a curve has been selected.

 READ CURVE

•        Displays the ¡°DSI File Dialog¡± window and allows the user to read in a previously saved curve (.cur) file.

        RENUMBER

     Renumber the selected load curve or all load curves. 

             SHOW CURVE

•     Displays the DEFINE CURVE CARD LIST with all defined curves.  By selecting a listed curve and exiting the list, the curve will be displayed.

 

-DEFINE: SPRING ORIENTATION

 

Description: The definition card in the SPRING ORIENTATION subsection defines orientation vectors for discrete springs and dampers.

 

Usage:

 

1.  When CREATE is selected, DSI prompts:

>   ENTER NEW VECTOR ID. (X) OR E TO EXIT

 

2.  Once the vector ID has been established, DSI prompts:

 SELECT SPRING ORIENTATION OPTION

    

 

•     After defining the vector, it is displayed with its vector number in the display window.

 

Note: Refer to the LS-DYNA User's Manual (Section 9.12) for further description.

 

 

-DEFINE: TABLE

 

Description: The definition card in the TABLE subsection defines a table.

 

Usage:

 

          1.  When CREATE is selected, the TABLE DEFINITION window appears.

 

Note: Refer to the LS-DYNA User's Manual for further description.

 

-DEFINE: VECTOR

 

Description: This function defines a vector using the coordinates of two nodes or points

 

Usage:

 

1.  When CREATE is selected, DSI prompts:

>    ENTER NEW VECTOR ID. (X) OR E TO EXIT

 

2.  Once the vector ID has been established, DSI prompts:

>    DEFINE TAIL OF VECTOR

          

 

3.  DSI prompts:

>    DEFINE HEAD OF VECTOR

 

•        After defining the vector head, the vector is displayed with its vector number in the display window.

 

Note: Refer to the LS-DYNA User's Manual for further description.